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公开(公告)号:US3575831A
公开(公告)日:1971-04-20
申请号:US3575831D
申请日:1968-05-22
申请人: HOFFMANN LA ROCHE
发明人: PFOERTNER KARLHEINZ
IPC分类号: C07C401/00 , B01J1/10 , C07G13/00
CPC分类号: C07C401/00 , C07C2601/14 , C07C2602/24 , Y10S204/90 , Y10S204/902 , Y10S204/912
摘要: A PROCESS FOR CONVERTING PROVITAMIN D INTO VITAMIN D BY IRRADIATION WITH ULTRAVIOLET LIGHT OF THE WAVE LENGTH OF 253.7MU. AT TEMPERATURES OF AT LEAST 50*C.